Alert archive / Minnesota / Mesoscale Discussions in 2012
Mesoscale Discussion 1540
The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2012, 2:32 PM CDT for 9 counties in Iowa; 14 counties in Minnesota; 7 counties in Wisconsin. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Jul 22, 2012, 2:32 PM CDT (19:32 UTC)
- Expired
- Jul 22, 2012, 4:00 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 30 counties
Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Howard County, IA, Mitchell County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Blue Earth County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Le Sueur County, MN, Mower County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Winona County, MN, Crawford County, WI, Grant County, WI, Iowa County, WI, La Crosse County, WI, Richland County, WI, Sauk County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 90 km from the middle of the area, began a volume at 19:31 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 7.5 hours before the alert went out and 174 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 130 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 1395 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 10:51 PM CDT | Mesoscale Discussion | SPC | Lincoln, Lyon, Murray, Nobles, Pipestone, Redwood and 2 more | 54 min |
| Jul 22, 1:40 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Koochiching and 7 more | 95 min |
| Jul 22, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 18 more | 6 hr |
| Jul 22, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Traverse | 4 hr |
| Jul 22, 6:55 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 11 more | 95 min |
Nearby
Mesoscale Discussions in Minnesota, 2012Mesoscale Discussions in Iowa, 2012Mesoscale Discussions in Wisconsin, 2012Every mesoscale discussion in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.